Hydrocarbon composition useful as a fuel and fuel oil...

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 65/04 (2006.01) C10L 1/08 (2006.01)

Patent

CA 2681097

The invention relates to a hydrocarbon composition, which can be used as a fuel and/or fuel oil, containing a petroleum component (A) and a component of a biological origin (B), wherein the component of a biological origin is present in a quantity of up to 75% by volume with respect to the total composition. Said component of a biological origin (B) is prepared starting from a mix of a biological origin (C) containing esters of fatty acids, with possible aliquots of free fatty acids, by means of a process which comprises the following steps: 1) hydrodeoxygenation of the mix of a biological origin; 2) hydroisomerization of the mix resulting from step (1), after possible water and gas flow separation, wherein said hydroisomerization is preferably carried out in the presence of a catalytic system comprising: a) a carrier of an acidic nature, comprising a completely amorphous micro-mesoporous silica-alumina, with a SiO2/Al2O3 molar ratio ranging from 30 to 500, a surface area larger than 500 m2/g, a pore volume ranging from 0.3 to 1.3 ml/g, an average pore diameter smaller than 40 A, b) a metal component containing one or more metals of group VIII, possibly mixed with one or more metals of group VIB.

L'invention se rapporte à une composition hydrocarbonée qui peut être utilisée comme carburant et/ou fioul et contenant un composant de pétrole (A) et un composant d'origine biologique (B), la teneur en composant d'origine biologique pouvant atteindre jusqu'à 75 % en volume par rapport à la composition totale. Ledit composant d'origine biologique (B) est préparé à partir d'un mélange d'origine biologique (C) contenant des esters d'acides gras et éventuellement des aliquotes d'acides gras libres, au moyen d'un procédé qui comprend les étapes suivantes : 1) hydrodésoxygénation du mélange d'origine biologique, 2) hydroisomérisation du mélange résultant de l'étape (1), après une séparation possible de l'eau et du flux gazeux, ladite hydroisomériscarrier ation est de préférence exécutée en présence d'un système catalytique comprenant : a) un porteur de nature acide comprenant une silice alumine micro-mésoporeuse complètement amorphe présentant un rapport molaire SiO2/Al2O3 compris entre 30 et 500, une surface catalytique active supérieure à 500 m~/g, une porosité comprise entre 0,3 et 1,3 ml/g, un diamètre moyen des pores inférieur à 40 A, b) un composant métallique contenant un ou plusieurs métaux du groupe VIII, mélangés éventuellement à un ou plusieurs métaux du groupe VIB.

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